It’s been a year since Sony Pictures Entertainment was left reeling after more than 170,000 emails and 30,000 internal documents were leaked by alleged North Korean hackers in retaliation for the U.S. release of the movie "The Interview."

Smart phones, tablets, newfangled tech gadgets: they are not just today’s must-have new toys, they literally contain the key to who gets to control an increasingly important natural resource, a new book argues.